Rosco Fluorescent Lighting Sleeves/Tube Guards are a very reliable and cost-effective system for easy control of tough lighting scenarios- especially under fluorescents. In addition to the financial benefits of the sleeves, they protect against the potential disaster of glass shattering by containing the lamp within the end caps.

Rosco sleeves are constructed of a solid polycarbonate tube within which is held the specific filter. The choice of filters and combination of filters is endless - there are complete Roscolux, Cinegel or E-Colour color filter lines - something for every venue, every photographer, every cinematographer.

For T5 Lamps    Over 300 Colors Available    UL94HB Rated Polycarbonate    End Caps Protect From Shattered Glass    Easily Trimmed with Scissors

Available in sizes for T12, T8 and T5 fluorescent lamps

The T8 and T5 sizes contain a UV filter that minimizes fading

All standard sizes (2, 4, 5, and 8') are easily trimmed to accommodate any size lamp

Related Questions and Answers

Q: 1. Are these tubes compatible with a Canon 70D and a Sigma 105mm macro lens?

A: They should operate fine. The only electrical components inside are simple pass through contacts for passing lens information to the camera body.There are no optical components inside, just air.There are some compromises involved with macro tube use.When in use, focus to infinity is usually not possible.Working distance becomes very close.Depth of field/plane of focus becomes very thin.Magnification = Total Extension / Focal Length + Lens' native magnification.In the case of your Sigma 105 macro, native magnification is 1:1.With the full 68mm stack of Kenkos, you'll get 68/105=0.65x additional magnification, 1.65x total. The shorter the lens' focal length, the greater the additional magnification.For example, using the full 68mm set with a 40mm pancake lens, magnification increases from 0.18x to 1.88x.Downside remains depth of field. 68mm extension with a 40mm lens results in depth of field the requires either a subject (and its plane of focus) be parallel to the sensor and/or focus stacking multiple frames. So, not sure what you're hoping for adding these to a 105mm macro lens, there will be some additional magnification, nothing radically different as with a shorter focal length.Can't help with crop factor differences, no experience, no interest.

Q: 2. Can the extension tube be used to allow a 1.4x or 2x teleconverter to be used with a lens that is not normally compatible with a teleconverter (ie. the EF24-70 f2.8L)?

A: No, they are extension tubes. These are for macro shots and are not designed to work with teleconverters.

Q: 3. Will these allow you to reverse your lens for even greater magnification? I'm sure you'd have to shoot full manual if you did.

A: No, a reverse adapter is a different accessory and method to get macro closeness. If you are using G lenses with no aperture ring, the reverse method is problematic because you wont have aperture control. These tubes send the aperture setting to the lens from the camera.

Q: 4. What dose DG stand for? I have a older set that are not DG.

A: DG helps you with electronic pass through info , for aperture control and autofocus

Q: 5. Can you use the extension rings with a true macro lens?

A: Yes you can. I have a Canon 100mm macro that I have used the extension tubes with and still get beautiful pictures - even of butterflies that dont stay still very long come out sharp. I would recommend this product. I keep it with me all the time.

Q: 6. Will these lenses keep the colors true? I need to take pictures of my handcrafted jewelry. My D3000 for some reason distorts colors, plus I need to get in closer for shots.

A: These are extension tubes, they have no glass in them and therefore will not affect the optical quality and color of the lens.

Q: 7. does anyone know what maximum ratio (e.g. 2:1) you can achieve with these on a canon 100mm f/2.8L and a canon 50mm f/1.8?

A: The set of 3 tubes will give maximum magnification of 1.65X with Canon 100L macro, and 1.45X with Canon 50mm F1.8II, and 1.51X with the new Canon 50mm STM. You can calculate the magnification for other lenses, on the site cambridgeincolour in the Tutorials section.

Q: 8. i see that these are compatible with the Canon EOS M, M2, M3, and M10 cameras, how about the M100? I'm hoping to build skills, as well as enjoy the sheer pleasure of photography with this new(to me) camera

A: Yes, it will work.

Q: 9. Can these tubes be stacked?

A: Yes, they can be stacked in any combination to gain additionnal lenght possibilities.

Q: 10. Hi, I own a GH4 with a panasonic 20mm 1.7, and a 45mm 1.7. Will it work with the kenko extension tube?

A: I used mine on an Olympus OMD-EM10, and they worked very well. They should work on your Panasonic, with a few caveats. Since the Olympus has sensor-shift image stabilization, I could not test to see if they have the connections for IS on Panasonic lenses. Also, you will have a very short working distance with those lenses. The 45 mm should work OK, but the 20 may be a little short. I mainly use mine with a 60 mm macro, but have used them on a 12-40mm zoom (mostly at 40mm) and also with the Panny 100-300 zoom. The longer the focal length of your lens, the better the working distance, which is especially important for insects. The Kenko tubes seemed well built, so I bought a set for my Nikon camera too.